Electric switch



M. GUETT Sept. 20, 1927.

ELECTRIC SWITCH Filed June 10,

1924 5 Sheets-Sheet l 1,643210 Sept. 20, 1927. M. GUETT ELECTRIC SWITCHFiled June 10, 1924 3 Sheets-Sheet 2 Sept. 20, 1927. 3, 10

M. G U ETT ELECTRIC SWITCH Filed June 10, 1924 s Sheets-Sheet 5 PatentedSept. 20, 1927.

UNITED S ATES 1,643,210 PATENT' OFFICE.

MONROE eunr'r, muons, connncrrcunnssrenon To run HART & inseamMANUFACTURING comremr, or'nnn'rronn, CONNECTICUT, A CORPORATION orcommences.

. nnnc'rmc swrrcir.

' Application filed'l 'une 10.1924. I sc n no.--7i9,i12. I

One-object of my invention is to construct an electric switch, which; isespecially adapted for regulating the amount of current, passing to an.electric heater, or other devices requiring diiferent amounts ofcurrent.

- A further object of the invention is to construct the mechanism sothat a switch plate can be raised clear of a stop plate when the switchdirection, and can e lowered clear of the stop plate when the spindle isturned in the opposite direction. I p v c In the present instance, theswitch is ar- 16 ranged to control three different degrees of heat andto cut ofl the current, but it will be understood that the number. ofterminalscan be increased, or decreased, without de parting from thespirit ofthe invention. While the improved switch is particularlyadapted for use in connection with an elec tric heater, it will beunderstood that'it can be used wherever a switch of this type isdesired. I c

In the accompanying drawings:

Fig. 1 is a sectional elevation of my improved switch on the line 1-1,Fig. 2;

Fig. 2 is a sectionalplan view on the line 2-2, Fig.1; I p Fig. 3' is asectional plan view on the line Figs. 4, 5 and 6' are diagrammatic v ewsillustrating difierent positions ofthe catch plate. in respect to thestop plate; and Fig. 7 is a erspective view illustrating parts of theswitch detached.

of the switch. Locatedin a recess 2 in the base is a stop plate 3, whichis shaped as shown in Fi 7, and secured to the base by screws 4;.epending from the center of t e stop plate is a' bearing 5 for the lowerendof the spindle 6. Below the bearing is a slotted washer 7, whichlocks the spindle imposition. The ortion 8 of the spindle has screwthreads t ercon and rests upon the top of the hearing so that thespindle isheld from moving longitudinally in the bearing, yet is free toturn therein. 1

The body portion 9 of the switch is mounted on the spindle so as tohavea ited movement thereon, which is controlled by the spindle through themedium of a coiled spring 10. The body portion 9 has. switch plates 11and 12, which are arranged indle is-turned in one- .18. Depending from acollar 22, secured to of the spring sponding direction.

,rods ass through non-conductin sleeves 21.

The ody portion may be modi ed without departing from the essentialfeatures of the nvention. The arrangementofthe switch plates andterminals may also be varied.

.- Projecting from the plate 18' is an arm 2 the spindle, is an arm 22.The ends of the spring 10 extend-0n each side of the arms, as shownclearly in Fig. 2 sothat, when the spindle is turned clockwise, theupper end.

is engaged by'the arm 22 to shift thebo y portion 9. When the spin dleis turned counter-clockwise, the lower endof the spring is engaged bythe arm 22',

which rotates the body portion in a corre- Carried by the collar 22 isan) indicator disk 23, which "has indicating marks thereon that can beexposed through a slot 24 in the cap 25, which encloses the workingparts of the switch. Secured to the spindle 6, above the cap, is ahandle 26 of an suitable con struction. 'The handle is hel tothe spindlebya nut 27.

The. switch hereinbefore described is j known as a snap switch. The sringis 901.

contracted to a certain extent and t e body Referring to the drawings, 1is thebase notches 28 in the stop plate'3. These pro- -jections 31 arebeveled'sllghtly, as shown,

and pass above or below the portions 29 of the stop plate, depending uon the direction of movement of the spin la. The catch plate 30 isnotched at 32. Depending from the bottom plate 19 of the body 9 are arms33, which extend into the notches 32 of the no catchplate'so that, whilethe catch plate free to move vertically, it must turn withthe bodyortion whenit is released the contro of the stop plate.

Referring to Figs. 4, 5 and 6 it will be seen that when the catch plateis in mid position, Fig. 4.-, it is locked from turning by the stopplate 3, as its projections 31 are in the notches 28 of said stop plate.When the handle is turned clockwise, the spring is compresed andis-moved a-certa n number of 7 degrees to raise the catch plateclea'r'of the. stop plate, as'in Fig. 5. Thismovement releases the bodyportion and the spring snaps the bod portion to the next position. The

catch p ate, however, does not move the full extent of themovement ofthe spindle and the spring isstill under tension. While the projectionsof the body portion are in position above the recesses in the stopplate, they do not engage both sides of the notches. On therelease ofthe handle, the spmdle. 1s moved backwards until the end of the springcomes in contact with the post on the body portion. This movement causesthe screw toinove the catch plate vertically into-the F notches so thatits projection'sare held between the two walls of thenotches in the stopplate. This movement can be repeated to turn the switch from the Offposition to the Low position, the Medium position, and the Hi hposition. 'When the spindle is turned anti-clockwise,

'as'in Fig. 6, the catch plate is lowered bythe action of the screwuntilit is clear of the stop plate and the spring will snap the bodyportion from one terminal to another, as

hereinbefore described.

, I claim:

1.- The combination in an electric switch,

, of a base; a-stop plate secured thereto; a

stop plate, said catch plate having a thread mesh ng with the thread ofthe screw so that, when the spindle is turned in one dlrec- 'tion, thecatch-plate is raised above the stop plate, and, when the spindle isturned in the reverse direction, 'itis moved below the stop plate.

2." The'combination in aswitch, of a base;

a notched stop plate thereon; a notched.

catch plate having portionsarranged to extend into the notches ofthe-stop plate; a

'spindle having switch plates thereon; terminals arranged to be engagedb the switch plates; and means, onthe spln le, for raismg the catchplate above the stop plate when the spindle is'turned in one direction,and

for lowering the catch-plate below the stop plate when the spindle isturned in the reverse. direction.

3.. The combination of a base; a notched from stpp plate thereon,- saidplate having inchned projectin portions; a spindle having a screw threadt ereon; a catch plate having a thread meshing with the screw thread and1 arranged to be raised or lowered on. the

movement of the spindle; a body portion having a-switch plate; andaspring connection between the body portion and the spindle, said catchplate being guided on the body portion so that it will turn therewith bytheaction of the spring when the catch plate is below or above the stopplate.

4. The combination in a rotary snap switch, of 'a base; astop platehaving notches therein secured to the base; a spindle; a body-portionmounted on the spindle, but arranged to rotate independently thereof toa limited extent; a spring engaged by the spindle and by the bodyportion, said spindle having a screw thread thereon; a catch platehaving a thread meshing with the thread of the screw, and havingportions aligning with the notches of the stop plate so that, when theplate is in a central position, the switch is held by the stop plate,and, when the spindle is turned clockwise, or counter clockwise, thecatch plate is raised or low- .cred,releasing the body; a switch plateon the-body; and terminals so located as to be engaged'by the switchplate.

5.'The combination in an electric switch, of a. fixed stop-plate havinginclined projectlons; a catch-plate arranged to engage the stop-plate; ascrew-threaded spindle for raisin the catch-plate to a point above thesto '-p ate or lowering it to a point below sai stop-plate; a bodyportion connected to the catch-plate, said body portion having contactplates; and a spring for' snapping the body portlon from one position toanother so that, when the catch-plate is moved out of alignment with thestop-plate, the body portion will sna from one position to another andthe catc late will be moved into engagement with t e stop-plate.

6. The combination in an electric switch, of a fixed stop plate havingrojections; a spindle having a screw threa the projectionsof the stopplate being on the same lead as the threads of the screws; a catch platehaving projections and arranged to engage the pro ect1ons of the stopplate, and also havin a thread meshing with the threads of t e screw; abody portion mounted loosely on the s indle and connected to the catchplate; an means for snapping the body portion from one position toanother in either direction when the catch plate is moved above or belowthe stop plate by the screw, said catch plate traveling on the screw tore-engage the stop plate at a predetermined oint.

-7. T e combination in an electric switch, of a stop plate having s acedinclined projections; a catch plate aving projections engaging the stopplate; a bod 7 portion connec'ted to the stop plate; a spin e; ascrew onturn the spindle and moves the projectionsof the catch plate into thespaces between the inclined projections of the stop plate.

of a stop plate having notches; inclined proavjec'tions between thenotches; a spindle ing a screw of the same lead as the inclinedprojections; a catch plate mounted on the screw and having projectionsarranged to enter the notches in the stop plate; a body portionconnected to the catch plate; and a spring between the body portion andthe spindle, which, whenthe spindle is turned, moves a given distance torelease the catch plate and-to snap the body portion from one positionto another, said spring having an' excess movement, which retractsthespindle, 8. The combination 1n an electric swltch,

when released, and causes the screw to move the projections of the catchplate in between the walls of the notches of the sto late.

. v iMONROE TT.

